Glaciation is the study of ice and its impact on the environment.
The Ice Age in Britain lasted from about one million years ago to about 20 000 years ago. During that time the Northern and Eastern parts of the British Isles were covered in ice. Glaciers were formed which move down valleys with great erosive power. These glaciers carved new scenery.
The video below shows The Aletsch Glacier, the largest glacier in the Alps, filmed from the Jungfrau, Switzerland.